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Thermal performance of ultra-thin flattened heat pipes with composite wick structure

Li, Yong, Zhou, Wenjie, He, Jiabin, Yan, Yuying, Li, Bo, Zeng, Zhixin (2016) Thermal performance of ultra-thin flattened heat pipes with composite wick structure. Applied Thermal Engineering, 102 . pp. 487-499. ISSN 1359-4311. (doi:10.1016/j.applthermaleng.2016.03.097) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:87889)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided.
Official URL:
https://doi.org/10.1016/j.applthermaleng.2016.03.0...

Abstract

This study proposes three composite wick structures (copper power or mesh sintered on grooved tube), namely, single arch-shaped sintered–grooved wick (SSGW), bilateral arch-shaped sintered–grooved wick (BSGW), and mesh–grooved wick (MGW), to improve the thermal performance of ultra-thin heat pipes (UTHPs). Phase-change flattening technology is employed to fabricate UTHPs. The morphologies of the wick structures after flattening are observed. An experimental apparatus is setup to investigate the thermal performance of UTHP samples under incremental heat loads. The heat transfer limits of UTHP are theoretically and experimentally analyzed. Capillary limit is found to be the main heat transfer limit, and the theoretical values of the samples with SSGW and BSGW are in good agreement with the experimental results. Results indicate that the maximum heat transport capacities are 12 W, 13 W and 14 W, under the corresponding optimum filling ratios of 70%, 70%, and 80%, for the SSGW, BSGW and MGW UTHPs, respectively. Evaporation and condensation thermal resistances of UTHP samples increase with the increase in the filling ratio before the occurrence of dry-out. UTHPs with SSGW have the least evaporation thermal resistance whereas UTHPs with MGW have the least condensation thermal resistance.

Item Type: Article
DOI/Identification number: 10.1016/j.applthermaleng.2016.03.097
Uncontrolled keywords: Ultra-thin heat pipe; Composite wick; Flattening; Thermal performance
Subjects: T Technology > TJ Mechanical engineering and machinery > Control engineering
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Engineering and Digital Arts
Depositing User: Amy Boaler
Date Deposited: 04 May 2021 08:36 UTC
Last Modified: 17 Aug 2022 12:22 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/87889 (The current URI for this page, for reference purposes)

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